<template>
    <div class="app-container">
        <el-form
            :model="queryParams"
            ref="queryForm"
            :inline="true"
            label-width="68px"
        >
            <el-form-item label="课件名" prop="varName">
                <el-input
                    v-model="queryParams.varName"
                    placeholder="请输入"
                    clearable
                    size="small"
                />
            </el-form-item>
            <el-form-item label="课件类型" prop="varType">
                <el-select v-model="queryParams.varType" style="width:100%;">
                    <el-option
                        v-for="dict in fileTypeOptions"
                        :key="dict.dictValue"
                        :label="dict.dictLabel"
                        :value="dict.dictValue"
                    />
                </el-select>
            </el-form-item>
            <!-- <el-form-item label="适用行业" prop="intBusiness">
                <el-input
                v-model="queryParams.intBusiness"
                placeholder="请输入"
                clearable
                size="small"
                @keyup.enter.native="handleQuery"
                />
            </el-form-item>-->
            <el-form-item>
                <el-button
                    type="primary"
                    icon="el-icon-search"
                    size="mini"
                    @click="handleQuery"
                    >搜索</el-button
                >
                <el-button
                    icon="el-icon-refresh"
                    size="mini"
                    @click="resetQuery"
                    >重置</el-button
                >
            </el-form-item>
        </el-form>

        <el-row :gutter="10" class="mb8">
            <el-col :span="1.5">
                <el-button
                    type="primary"
                    icon="el-icon-plus"
                    size="mini"
                    @click="handleAdd"
                    v-hasPermi="['system:attachment:add']"
                    v-if="jurisdiction"
                    >新增</el-button
                >
            </el-col>
            <el-col :span="1.5">
                <el-button
                    type="danger"
                    icon="el-icon-delete"
                    size="mini"
                    :disabled="multiple"
                    @click="handleDelete"
                    v-hasPermi="['system:attachment:remove']"
                    v-if="jurisdiction"
                    >删除</el-button
                >
            </el-col>
        </el-row>

        <el-table
            v-loading="loading"
            :data="attachmentList"
            @selection-change="handleSelectionChange"
        >
            <el-table-column
                type="selection"
                width="55"
                align="center"
                v-if="jurisdiction"
            />
            <el-table-column label="课件名" align="center" prop="varName" />
            <el-table-column label="课件类型" align="center" prop="varType" />
            <el-table-column
                label="适用行业"
                align="center"
                prop="varIndustry"
            />
            <el-table-column label="课件状态" align="center" prop="chrValid" />
            <el-table-column
                label="操作"
                align="center"
                class-name="small-padding fixed-width"
            >
                <template slot-scope="scope">
                    <el-button
                        size="mini"
                        type="text"
                        icon="el-icon-edit"
                        @click="preview(scope.row)"
                        >预览</el-button
                    >
                    <el-button
                        size="mini"
                        type="text"
                        icon="el-icon-delete"
                        @click="handleDelete(scope.row)"
                        v-hasPermi="['system:attachment:remove']"
                        v-if="jurisdiction"
                        >删除</el-button
                    >
                </template>
            </el-table-column>
        </el-table>

        <pagination
            v-show="total > 0"
            :total="total"
            :page.sync="queryParams.pageNum"
            :limit.sync="queryParams.pageSize"
            @pagination="getList"
        />

        <!-- 添加或修改附件管理对话框 -->
        <el-dialog title="" :visible.sync="open" width="65%" append-to-body>
            <el-table
                v-loading="loading"
                :data="allAttachmentList"
                ref="multipleTable"
                @selection-change="handleSelectionChange1"
            >
                <el-table-column type="selection" width="55" align="center" />
                <el-table-column label="课件名" align="center" prop="varName" />
                <el-table-column
                    label="课件类型"
                    align="center"
                    prop="varType"
                />
                <el-table-column
                    label="适用行业"
                    align="center"
                    prop="varIndustry"
                />
                <el-table-column
                    label="课件状态"
                    align="center"
                    prop="chrValid"
                />
            </el-table>
            <pagination
                v-show="allTotal > 0"
                :total="allTotal"
                :page.sync="allQueryParams.pageNum"
                :limit.sync="allQueryParams.pageSize"
                @pagination="getAllCoursewareList"
            />
            <div slot="footer" class="dialog-footer">
                <el-button type="primary" @click="submitForm">确 定</el-button>
                <el-button @click="cancel">取 消</el-button>
            </div>
        </el-dialog>
        <preview
            :previewUrl="previewUrl"
            :previewVarExt="previewVarExt"
            v-model="showPreview"
        />
    </div>
</template>

<script>
import { listAttachment, listCourseAttachment, getAttachment, delCourseAttachment, addAttachment, updateAttachment, exportAttachment, courseAddAttchment } from "@/api/system/attachment";
import preview from '@/components/preview'
export default {
    name: "coursrAttachment",
    components: {
        preview
    },
    data () {
        return {
            // 遮罩层
            loading: true,
            // 选中数组
            ids: [],
            deleteNames: [],
            attachmentIds: [],
            // 非单个禁用
            single: true,
            // 非多个禁用
            multiple: true,
            // 总条数
            total: 0,
            allTotal: 0,
            // 附件管理表格数据
            attachmentList: [],
            allAttachmentList: [],
            // 是否显示弹出层
            open: false,
            // 查询参数
            queryParams: {
                pageNum: 1,
                pageSize: 10,
                varCode: undefined,
                varName: undefined,
                intClassHour: undefined,
                varType: undefined,
                chrSource: undefined,
                intBusiness: undefined,
                chrComplete: undefined,
                chrValid: undefined,
            },
            allQueryParams: {
                pageNum: 1,
                pageSize: 10
            },
            fileTypeOptions: [],
            jurisdiction: false,
            previewUrl: '',
            previewVarExt: '',
            showPreview: false
        };
    },
    activated () {
        this.initFn()
    },
    methods: {
        initFn () {
            this.getDicts("var_type").then(response => {
                this.fileTypeOptions = response.data;
            });
            this.queryParams.courseId = this.$route.query.courseId
            this.jurisdiction = this.$route.query.jurisdiction
            this.getList();
        },
        /** 查询附件管理列表 */
        getList () {
            this.loading = true;
            listCourseAttachment(this.queryParams).then(response => {
                this.attachmentList = response.rows;
                this.total = response.total;
                this.loading = false;
            });
        },
        // 取消按钮
        cancel () {
            this.open = false;
            this.reset();
        },
        /** 搜索按钮操作 */
        handleQuery () {
            this.queryParams.pageNum = 1;
            this.getList();
        },
        /** 重置按钮操作 */
        resetQuery () {
            this.resetForm("queryForm");
            this.handleQuery();
        },
        // 多选框选中数据
        handleSelectionChange (selection) {
            this.ids = selection.map(item => item.id)
            this.deleteNames = selection.map(item => item.varName)
            this.single = selection.length != 1
            this.multiple = !selection.length
        },
        handleSelectionChange1 (selection) {
            this.attachmentIds[this.allQueryParams.pageNum] = selection.map(item => item.id)
        },
        /** 新增按钮操作 */
        handleAdd () {
            this.getAllCoursewareList();
        },
        /** 提交按钮 */
        submitForm: function () {
            let attachmentIds = this.attachmentIds.flat()
            courseAddAttchment({
                "attachmentId": attachmentIds.join(','),
                "courseId": this.$route.query.courseId
            }).then(() => {
                this.msgSuccess("添加成功");
                this.attachmentIds = []
                this.$refs.multipleTable.clearSelection();
                this.open = false;
                this.getList();
            })
        },
        /** 删除按钮操作 */
        handleDelete (row) {
            const ids = row.id || this.ids;
            const names = row.varName || this.deleteNames.join('，')
            this.$confirm('是否确认删除课件名为"' + names + '"的数据项?', "警告", {
                confirmButtonText: "确定",
                cancelButtonText: "取消",
                type: "warning"
            }).then(() => {
                return delCourseAttachment(this.queryParams.courseId, ids);
            }).then(() => {
                this.getList();
                this.msgSuccess("删除成功");
            }).catch(function () { });
        },
        /** 导出按钮操作 */
        handleExport () {
            const queryParams = this.queryParams;
            this.$confirm('是否确认导出所有课件数据项?', "警告", {
                confirmButtonText: "确定",
                cancelButtonText: "取消",
                type: "warning"
            }).then(function () {
                return exportAttachment(queryParams);
            }).then(response => {
                this.download(response.msg);
            }).catch(function () { });
        },
        getAllCoursewareList () {
            listAttachment(this.allQueryParams).then(response => {
                this.open = true;
                this.allAttachmentList = response.data.rows;
                this.allTotal = response.data.total;
                let selectRowIds = this.attachmentIds[this.allQueryParams.pageNum]
                this.$nextTick(() => {
                    if (selectRowIds) {
                        this.allAttachmentList.forEach(item => {
                            if (selectRowIds.indexOf(item.id) != -1) {
                                this.$refs.multipleTable.toggleRowSelection(item);
                            }
                        })
                    }
                })
            });
        },
        preview (row) {
            this.previewVarExt = row.varExt
            const regImg = ['jpg', 'png', 'bmp']
            if (row.varExt === 'mp4' || row.varExt === 'mp3' || regImg.indexOf(row.varExt) !== -1) {
                this.previewUrl = row.varUrl
                this.showPreview = true
            } else if (row.varExt === 'pdf') {
                this.previewUrl = row.varUrl
                this.showPreview = true
            } else {
                this.$message({
                    message: '文件预览暂未开通',
                    type: 'warning'
                });
            }
        }
    }
};
</script>
